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Adtran – Multiple VRFs with Internet Access

I recently had to create a configuration that contained multiple VRFs that all NAT/PAT out the same ISP connection. There is also a managed circuit that connects back to the Managed Service Provider (MSP) for management. All dynamic routing configs will need to be placed in the global routing table (default vrf). For this example, assume that the MSP is in the GRT.

To begin, we need to define our vrfs. For this example I will use the following :

We need to set a default route for the TENANT VRFs. We need an egress interface or IP address for this. As traffic is going to the same physical device, we must first configure a few loopback interfaces.